1Department of Pediatrics, Haukeland University Hospital, University of Bergen, Bergen, Norway
2Howard Hughes Medical Institute and the Departments of Biochemistry and Molecular Biology, Medicine, and Human Genetics, University of Chicago, Chicago, Haukeland University Hospital, University of Bergen, Bergen, Norway
3Department of Biochemistry and Biophysics and the Diabetes Research Center, University of Pennsylvania School of Medicine, Philadelphia
4Center for Medical Genetics and Molecular Medicine, Haukeland University Hospital, University of Bergen, Bergen, Norway
5San Raffaele Scientific Institute, Milan, Italy
6Institute of Immunology, National Hospital, Oslo, Norway
7Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville